Does the garnish have to be part of the dish or JUST a garnish? I like the look of those long strings of lemon zest around the edge of the plate. You have a lot of green and white, if he added a couple of cherry tomato "tulips" and some lemon zest it would perk up the color a lot.

__________________You're only given a little spark of madness. You mustn't lose it. Robin Williams Alix